Not exaggerating to say this product is one of the BEST invented/manufactured.  Why would I say such a thing about a litterbox spray?  It's because I've rescued & loved cats for 45+ years & keeping box clean & not smelly is VERY important - for people AND cats!!  Just removing waste is not enough, even done immediately after use. After removing & especially after washing box, I spray box/litter heavily. Not only does it remove residual smell it protects box & makes it non-stick!  This is the most important part of my arsenal to maintain litterbox hygiene!  When no longer sold at stores I resorted to baby powder &/or baking soda & it wasn't comparable to the spray.  So grateful I can order direct & will never run out!  Thank you so kindly. -Tina